920861537 has 2 divisors, whose sum is σ = 920861538. Its totient is φ = 920861536.

The previous prime is 920861507. The next prime is 920861549. The reversal of 920861537 is 735168029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719902561 + 200958976 = 26831^2 + 14176^2 .

It is a cyclic number.

It is not a de Polignac number, because 920861537 - 2²² = 916667233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 920861494 and 920861503.

It is not a weakly prime, because it can be changed into another prime (920861507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460430768 + 460430769.

It is an arithmetic number, because the mean of its divisors is an integer number (460430769).

Almost surely, 2^920861537 is an apocalyptic number.

It is an amenable number.

920861537 is a deficient number, since it is larger than the sum of its proper divisors (1).

920861537 is an equidigital number, since it uses as much as digits as its factorization.

920861537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 920861537 is about 30345.7004697535. The cubic root of 920861537 is about 972.8923261600.

The spelling of 920861537 in words is "nine hundred twenty million, eight hundred sixty-one thousand, five hundred thirty-seven".